Elementary Sky-Blue icons specially designed for Elementary OS,
these icons are based on Ubuntu style and OSX-Nostalgie,
it can be used also in Linux Mint 13/14/15 and
Ubuntu 12.04/12.10/13.04. In this theme
(icon set) was used and optimized
the best that there is in free software.
These icons are available in three versions:
Sky-Blue-Unity is designed for Unity desktop,
Sky-Blue-Gnome is designed for Gnome/Gnome Shell desktop,
and Sky-Blue-Cinnamon is designed for Cinnamon desktop environment.

Any of these versions can be operated in any
of the desktops and all distributions based on Ubuntu.

In the screenshots you can see three versions
of the icon set Elementary Sky Blue on three desktops:

Beautiful! It's the perfect blue icon theme I've been searching for. I love blue, and these icons work and look great on my LM 13 Cinnamon. Thank you for providing these. I was wondering what theme you used for your windows in the Cinnamon screenshot?